Hi List,
In order te reproduce an issue we see on a production cluster (cephFS
client: ceph-fuse outperform kernel client by a factor of 5) we would
like to have a test cluster to have the same cephfs "flags" as
production. However, it's not completely clear how certain features
influence the cephfs flags. What I could find in the source code,
cephfs_features.h, is that it *seems* to correspond to the Ceph release.
For example CEPHFS_FEATURE_NAUTILUS gets a "12" as feature bit. An
upgraded (Luminous -> Mimic -> Nautilus) cephfs gives us the following
cephfs flags: "1c".
A (newly installed) Nautilus cluster gives "10" when new snapshots are
not allowed (ceph fs set cephfs allow_new_snaps false) and "12" when new
snapshots are allowed (ceph fs set cephfs allow_new_snaps true).
We would like to have the test cluster get the "1c" flags and see if we
can reproduce the issue. How can we achieve that?
Any info on how those cephfs flags are constructed is welcome.
Thanks,
Gr. Stefan
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